Carbon monoxide gas sensing using zinc oxide film deposited by spray pyrolysis

Issue Date

5-2017

Abstract

This study was aimed to determine the carbon monoxide (CO) gas sensing ability of zinc oxide (ZnO) film fabricated by spray pyrolysis on glass substrate heated at 3000C using 0.2 M zinc acetate precursor solution. The temperature of the precursor solution was maintained at room temperature. Carbon monoxide gas was synthesized by mixing the required amount of formic acid and excess sulfuric acid in the ratio of 1:6 to produce CO gas concentrations of 100, 200, 300, 400, and 500 parts per million (ppm) v/v. There were five trials for each concentration. The films produced exhibited good sensor characteristics such as high linearity in current voltage relationship and voltage response versus concentration. Electrical characterization using the four-point probe showed a linear relationship between current and voltage with resistivity of 0.49 ohm-cm and R2 value of 0.994 The zinc oxide film exhibited a sensitivity of 0.19 Volt per 100 ppm of CO gas and linearity R2 value of 0.993.

Source or Periodical Title

IOP Conference Series: Materials Science and Engineering

ISSN

1757-8981

Volume

201

Issue

1

Page

1-5

Document Type

Conference Paper

Physical Description

illustrations, graphs

Language

English

Identifier

doi:10.1088/1757-899X/201/1/012051

Digital Copy

yes

Link to Full Text

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